Evaluate -2 x 2y , if x = -3 and y = -1. -12 -18 18 12

Mathematics

1 answer:

Rina8888 [55]3 years ago

8 0

Answer:

-559872

Without adding in the additonal Numbers

-4xy

Step-by-step explanation:

Im most likely way off so please, i am Not going to guarantee that this answer is correct

(This is the first time ive been unsure of my Answer so please take my warning into consideration)

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xxMikexx [17]

The answer is d because 42/45 as a percentage is 93

7 0

3 years ago

Despeja g. -3+5+6g=11-3g

Len [333]

Answer: The value of g is 1

Step-by-step explanation:

To solve for g in the algebraic expression below: collect like terms

-3+5+6g=11-3g

2 + 6g = 11 - 3g

Let the whole algebraic expression equal zero by moving 11 -3g to left hand side while the minus sign becomes plus sign '+' since it crossed the equality sign '=')

Thus, 2 + 6g - 11 + 3g = 0

collect like terms again

2 - 11 + 6g + 3g = 0

-9 + 9g = 0

-9 = -9g

Divide both sides by -9

-9/-9 = -9g/-9

1 = g

Thus, the value of g is 1

5 0

3 years ago

Use the shell method to find the volume of the solid generated by revolving the regions bounded by the curves and lines about th

RSB [31]

Answer:

The volume of the solid is:

$\displaystyle\frac{19\pi}{6}$

Step-by-step explanation:

See the graph of the region attached.

To find the intersection between the line and the parabola we set the equation equal to each other, and solve that quadratic equation by factorization:

$x^2=9-8x\\x^2+8x-9=0\\(x+9)(x-1)=0\\x=-9,x=1$

Since the region is the one for $x\ge 0$ then the intersection we are interested on is x=1 as it can also be seen in the graph.

Then we set the integral using shell method for revolving about the y-axis:

$\displaystyle\int_a^b 2\pi\,x\,h(x)\,dx$

Where h(x) is the height of the shell which here is the distance between the parabola and the line, so $8x-9-x^2$ (since the line is on the top we subtract from it the parabola)